Air source heat pump compressor noise can indicate anything from normal operation to serious faults such as refrigerant imbalance, vibration, or internal wear. In the UK, repair costs typically range from £100 to £800, but ignoring early warning signs can lead to £3,000+ compressor failure. This guide explains causes, diagnostics, and professional solutions.

A noisy air source heat pump can indicate anything from normal operation to serious compressor or refrigerant problems. This UK guide explains common heat pump noises, what causes them, DIY checks, professional diagnostics, repair costs, and when to call an engineer before minor issues become expensive failures.